CN105860815A - Waterborne anti-static anti-corrosive thermal insulation coating and preparation method - Google Patents
Waterborne anti-static anti-corrosive thermal insulation coating and preparation method Download PDFInfo
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
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- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K7/00—Use of ingredients characterised by shape
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- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
Abstract
The invention discloses a waterborne anti-static anti-corrosive thermal insulation coating which uses hydroxyl acrylic dispersion and modified polyester dispersion as film forming matter, uses titanium dioxide as a pigment and uses conductive potassium titanate whiskers and graphene as conductive fillers. Under the matching action of functional agents, the waterborne anti-static anti-corrosive thermal insulation coating is obtained by the steps of: a, preparing graphene waterborne slurry with concentration of 3%; b, preparing an A component; C, preparing a B component; after the A component and the B component are blended according to a mass ratio of 100: (15 to 16), the waterborne anti-static anti-corrosive thermal insulation coating is used in the construction. The waterborne anti-static anti-corrosive thermal insulation coating integrates a primer with a finishing coat, has excellent static conductivity, corrosion resistance, thermal radiation insulation, weather resistance and prominent materialization, and is suitable to widely popularize and apply.
Description
Technical field
The present invention relates to industrial coating technical field, especially relate to a kind of aqueous antistatic anticorrosive heat insulating coating and
Preparation method.
Technical background
Along with national economy development and science and technology progress, improve People's livelihood, protect environment, economize on resources, energy-conservation
Reduce discharging, developing a circular economy becomes the fundamental state policy of China.At present, domestic application is in spacecraft, petroleum pipeline
The antistatic anticorrosive paint of road, oil storage tank, drilling platforms, industrial equipment etc., mainly with epoxy resin, third
The end that olefin(e) acid resin, polyester resin, polyurethane etc. are film forming matter, in, face matching dissolvent type coating, priming paint one
As be epoxy zinc-rich paint, in be painted with cloud ferrum intermediate coat, topcoating is polyurethane thermal insulating coating.Producing and work progress
In, owing to solvent volatilizees, i.e. the waste energy pollutes again environment, there is also hidden danger, and working procedure
Loaded down with trivial details.Currently, aqueous polyurethane antistatic anticorrosive heat insulating coating is the focus that this area is developed, and aqueous is gathered
Urethane antistatic anticorrosive heat insulating coating is the high-quality coating that a kind of performance has concurrently with environmental protection, and it not only has solvent
The advantages such as the hardness of type bicomponent polyurethane coating is high, resistance to medium is good, film-forming temperature is low and adhesive force is strong, and
And volatile organic matter (voc) content is extremely low, it is a kind of high-performance, low-carbon environment-friendly coating.Its coating surface
Not only there is good electrostatic conductiveness, also there is good heat insulation and heat control and anti-corrosive properties, and easy construction.Grind
Send out a kind of dual-component aqueous polyurethane antistatic anticorrosive heat insulating coating, to solve the painting of existing anti-electrostatic solvent anticorrosion
The end present in material technology, in, finish paint function singleness, need matching operation;Produce, work progress pollutes ring
Border, the waste energy;Easily produce the problems such as potential safety hazard, be the art task of being currently needed for.
Summary of the invention
It is an object of the invention to provide that a kind of hardness is high, resistance to medium is good, film-forming temperature is low and adhesive force is strong, low
The aqueous antistatic anticorrosive heat insulating coating that carbocyclic ring is protected, also provides for its preparation method simultaneously.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of aqueous antistatic anticorrosive heat insulating is coated with
Material, with hydroxyl acrylic aqueous dispersion, modified poly ester dispersion as film forming matter, with titanium dioxide as pigment, with conduction
Potassium titanate crystal whisker, Graphene are conductive filler, under the cooperation of function additive, are prepared as having antistatic concurrently, preventing
The multi-functional end rotten, heat insulation, finish paint unification coating, in its formula, each component composition constitutes as follows;
Wherein: component A includes the component of following mass fraction %:
Hydroxyl acrylic aqueous dispersion 20-40,
Modified poly ester dispersion 10-20,
Rutile type titanium dioxide 5-10,
Zinc aluminum phosphate 10-15,
Conduction potassium titanate fibre 5-10,
Graphene powder 0.2-0.6,
Coalescents 1-2,
Dispersant 0.5-1,
Wetting agent 0.2-0.3,
Defoamer 0.3-0.5,
Levelling agent 0.3-0.5,
Antifungus agent 0.2,
PH value regulator 0.1-0.15,
Thickening agent 0.5-1,
Deionized water 5-15;
B component is sulfamate modification HDI isocyanates 15-16;
The most each constituent content is mass fraction.
The step of preparation process of aqueous antistatic anticorrosive heat insulating coating described above is as follows:
A. prepare 3% Graphene aqueous to starch:
Based on mass fraction %, by dispersant 0.3-0.5, wetting agent 0.2-0.4, defoamer 0.2-0.4, many merits
Can add in deionized water 96 by amine auxiliary agent 0.1-0.2, dispersed with stirring be uniform, is slowly added to Graphene powder 3, dispersion
Supersonic oscillations 0.5h after uniformly, grind through nano-level grinder and are prepared as 3% Graphene slurry;
The preparation of b.A component:
Based on mass fraction %, deionized water 5-15 is added in dispersion tank, add under moderate-speed mixer dispersant 0.5-1,
Wetting agent 0.2-0.3, defoamer 0.3-0.5, levelling agent 0.3-0.5, antifungus agent 0.2, pH value regulator
0.15, Rutile type titanium dioxide 5-10, zinc aluminum phosphate 10-15, conduction potassium titanate fibre 5-10, high speed dispersion
30min, ground fineness reaches the graining paste of 30um;Above-mentioned graining paste is added in paint mixing tank, moderate-speed mixer
Lower addition Graphene slurry 7-20, hydroxyl acrylic aqueous dispersion 20-40, modified poly ester dispersion 10-20, add
Coalescents 1-2, defoamer 0.1-0.2, thickening agent 0.5-1, stir 20min, filter, pack.
The preparation of c.B component;By the sulfamate modification independent packed for standby use of HDI isocyanates;
During construction, with mass fraction by component A: B component=100:15-16 mixture.
In present invention composition, the mechanism of each component is:
(1) membrane formation mechanism of aqueous polyurethane coating with bi component: the film forming matter of the present invention is divided by hydroxy acrylic acid
A prose style free from parallelism and modified poly ester dispersion mixture, sulfamate modification HDI isocyanates are double groups of firming agent composition
Divide solidfied material.In wet coating, first after most of moisture is evaporated, emulsion particle contacts with each other, and is formed tight
Close-packed structure, residual moisture and firming agent molecule are then in the gap location of emulsion particle, enter one along with moisture
Step evaporation, emulsion particle starts to condense, and forms the most close hexagonal array structure, meanwhile, solidification
Agent molecule is diffused into the interface of emulsion particle and inside crosslinks curing reaction.Hardness of film after solidification
High, pliability is good, gloss is high, richness is high, have good weatherability, light resistance and resistance toization of excellence
Learn moral character, heavy antisepsis.
(2) conductive filler electrical conduction mechanism in coating: conduction potassium titanate crystal whisker fiber makees water with Graphene mixture
The filler of property antistatic anticorrosive heat insulating coating.Conduction potassium titanate crystal whisker fiber, its outward appearance in light grey fiber powdery,
Average diameter 0.4-0.7um, average length is in 10-20um, resistivity < 100Ω.cm.Graphene is a kind of
The monolayer carbon atomic plane material separated from graphite material, be a kind of novel by carbon atom with SP2Hydridization rail
The hexagon of road composition is the flat film of honeycomb lattice, and high rigidity can stretch again simultaneously.Its electronics under room temperature
Mobility is more than 15 000cm2/ (V s),ResistivityAbout 10-6 Ω cm.By above-mentioned conductive material with
Suitably mass ratio is dispersed in organic resin, when conductive filler content exceedes certain value, and the resistance of film
Rate declines rapidly, shows stronger electric conductivity.
(3) anticorrosion mechanism of aqueous antistatic anticorrosive heat insulating coating: aqueous two-component polyurethane solidfied material has itself
The chemical-resistant of good weatherability, light resistance and excellence, heavy antisepsis.Color stuffing is by rutile type titanium
White lead, zinc aluminum phosphate, conduction potassium titanate crystal whisker fiber, Graphene form.Rutile type titanium dioxide is that refractive power refers to
The Chinese white that number (2 8) is the highest, luminous reflectance reaches 80%;Have strong covering power, refraction index high,
The advantages such as sunlight reflection coefficient colour retention big, weather-proof is good, chemicals-resistant corrosion.Based on aqueous light color antistatic
In heat-insulating anti-corrosive coating formula, in the premise ensureing that coating specific insulation is relatively low, sun reflectivity is the highest
Under, add appropriate Rutile type titanium dioxide, the combination property of coating can be improved.Zinc aluminum phosphate is that zinc phosphate changes
Second filial generation rust resisting pigment after property, has zinc phosphate and aluminum phosphate double grading concurrently, and zinc aluminum phosphate is met the water capacity and easily dissociated
And hydrolysis, produce second filial generation phosphate ion, phosphate radical and rust ionic reaction, produce hard to tolerate and close phosphorus
Acid adhesive layer, causes anode polarization;And zinc, aluminium ion and the OH on cathode chamber-1Reaction, generate thing hard to tolerate and
Cause cathodic polarization, there is inhibition, passivation, and also have good optical property, sunlight heat is had
Higher reflectance and far infrared transmissivity.
The aqueous polyurethane conduction anti-corrosive properties of anticorrosive heat insulating coating, the consistency phase of physical and mechanical properties and coating
Close.When face fills out grain through little, be uniformly dispersed in the netted film of organic seriality, be tightly combined, voidage low time,
Coating is fine and close.Conduction potassium titanate crystal whisker and graphene nano material are scattered in coating, nanoparticle and poly-ammonia
Ester resin and water generation interfacial reaction, form activated adoption center, make in coating resin and color stuffing and base material it
Between form bonding force, constitute tridimensional network, substantially increase the consistency of coating, toughness, hardness, resistance to
Impact, adhesive force and the performance such as corrosion-resistant, can stop the corrosive medium etch to base material effectively.
(4) insulating mechanism of aqueous antistatic anticorrosive heat insulating coating: the heat conductivity of Graphene is up to
5300W/m.K, reaches 98%, ultraviolet reflection rate reaches 85% to infrared reflection rate.Graphene has high-ratio surface
Long-pending, high-termal conductivity, high IR emissivity, excellent chemical stability, prominent mechanical property.Graphene
High-specific surface area makes it dispersed in the coating, increases coating area of dissipation, significantly improve infrared emittance,
Reduce body surface and internal temperature, improve the radiation heat insulation of coating.Conduction potassium titanate crystal whisker has excellence
Properties of infrared reflection and physicochemical properties, the coating prepared for filler with it, its film has excellence equally
Infrared external reflection thermal insulation.Bi-material is reasonably combined, not only can increase the area of dissipation of coating, improves infrared
Penetrate rate, strengthen effect of heat insulation, and the comprehensive physical and chemical performance of coating can be improved.
After testing, the performance of the aqueous antistatic anticorrosive heat insulating coating of the present invention is as follows:
Above-mentioned detection data show, it is heat insulation that film of the present invention has the electrostatic conductiveness of excellence, anticorrosive property, heat radiation concurrently
Property, weatherability and prominent materialization.
Detailed description of the invention
Below in conjunction with embodiment in detail the present invention is described in detail: a kind of aqueous antistatic anticorrosive heat insulating coating, in its formula each group
Part composition constitutes as follows;
Wherein: component A includes the component of following mass fraction %:
Hydroxyl acrylic aqueous dispersion 20-40,
Modified poly ester dispersion 10-20,
Rutile type titanium dioxide 5-10,
Zinc aluminum phosphate 10-15,
Conduction potassium titanate fibre 5-10,
Graphene powder 0.2-0.6,
Coalescents 1-2,
Dispersant 0.5-1,
Wetting agent 0.2-0.3,
Defoamer 0.3-0.5,
Levelling agent 0.3-0.5,
Antifungus agent 0.2,
PH value regulator 0.1-0.15,
Thickening agent 0.5-1,
Deionized water 5-15;
B component is sulfamate modification HDI isocyanates 15-16;
The most each constituent content is mass fraction.
Embodiment 1
Component A: based on mass fraction %, deionized water 15, dispersant 0.5, wetting agent 0.2, defoamer Ai0.3,
Levelling agent 0.3, antifungus agent 0.2, pH value regulator 0.15, Rutile type titanium dioxide 10, zinc aluminum phosphate 15,
Conduction potassium titanate fibre 10, Graphene slurry 7, hydroxyl acrylic aqueous dispersion 20, modified poly ester dispersion 20,
Coalescents 1, thickening agent 0.5.
B component: sulfamate modification HDI isocyanates 12.
By component A during construction: B component=100:12 (weight fraction) mixture.
Preparation method, comprises the following steps:
A. prepare 3% Graphene aqueous slurry, be below mass parts:
Based on mass fraction %, by dispersant 0.3-0.5, wetting agent 0.2-0.4, defoamer 0.2-0.4, many merits
Can add in deionized water 96 by amine auxiliary agent 0.1-0.2, dispersed with stirring be uniform, is slowly added to Graphene powder 3, dispersion
Supersonic oscillations 0.5h after uniformly, grind through nano-level grinder and are prepared as 3% Graphene slurry;
The preparation of b.A component:
Based on mass fraction %, deionized water 15 is added in dispersion tank, under moderate-speed mixer, adds dispersant Hy0.5,
Wetting agent 0.2, defoamer 0.3, levelling agent 0.3, antifungus agent 0.2, pH value regulator 0.15, rutile-type
Titanium dioxide 10, zinc aluminum phosphate 15, conduction potassium titanate fibre 10, high speed dispersion 30min, ground fineness reaches
The graining paste of 30um.Above-mentioned graining paste is added in paint mixing tank, under moderate-speed mixer, add Graphene slurry 7, hydroxyl
Base acrylic acid dispersion 20, modified poly ester dispersion 20, addition coalescents 1, defoamer 0.1, thickening agent 0.5,
Stirring 20min, filters, packs.
C.B component is that sulfamate modification HDI isocyanates 12kg individually packs.
By component A during construction: B component=100:12 (weight fraction) mixture.
Embodiment 2
Component A: based on mass fraction %, deionized water 12, dispersant 0.7, wetting agent 0.25, defoamer A0.4,
Levelling agent 0.4, antifungus agent 0.2, pH value regulator 0.15, Rutile type titanium dioxide 7, zinc aluminum phosphate 12, lead
Electricity potassium titanate fibre 7, Graphene slurry 14, hydroxyl acrylic aqueous dispersion 30, modified poly ester dispersion 15, become
Film auxiliary agent 1.5, thickening agent 0.7;
B component: sulfamate modification HDI isocyanates 15.
By component A during construction: B component=100:15 (weight fraction) mixture.
Preparation method and same as in Example 1.
Embodiment 3
Component A: based on mass fraction %, deionized water 5, dispersant 0.5, wetting agent 0.25, defoamer A0.4,
Levelling agent 0.5, antifungus agent 0.2, pH value regulator 0.15, Rutile type titanium dioxide 5, zinc aluminum phosphate 10, conduction
Potassium titanate fibre 5, Graphene slurry 20, hydroxyl acrylic aqueous dispersion 40, modified poly ester dispersion 10, film forming
Auxiliary agent 2, thickening agent 0.8.
B component: sulfamate modification HDI isocyanates 16.
By component A during construction: B component=100:16 (weight fraction) mixture.
Preparation method is same as in Example 1.
The above is several preferred implementations of the present invention, it is noted that common for the art
Technical staff, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, this
A little improvements and modifications also should be regarded as protection scope of the present invention.
Claims (2)
1. an aqueous antistatic anticorrosive heat insulating coating, with hydroxyl acrylic aqueous dispersion, modified poly ester dispersion be
Film forming matter, with titanium dioxide as pigment, to conduct electricity potassium titanate crystal whisker, Graphene as conductive filler, at function additive
Cooperation under, be prepared as having concurrently antistatic, anticorrosion, the heat insulation multi-functional end, finish paint unification coating, in its formula
Each component composition constitutes as follows;Wherein:
Component A includes the component of following mass fraction %:
Hydroxyl acrylic aqueous dispersion 20-40,
Modified poly ester dispersion 10-20,
Rutile type titanium dioxide 5-10,
Zinc aluminum phosphate 10-15,
Conduction potassium titanate fibre 5-10,
Graphene powder 0.2-0.6,
Coalescents 1-2,
Dispersant 0.5-1,
Wetting agent 0.2-0.3,
Defoamer 0.3-0.5,
Levelling agent 0.3-0.5,
Antifungus agent 0.2,
PH value regulator 0.1-0.15,
Thickening agent 0.5-1,
Deionized water 5-15;
B component is sulfamate modification HDI isocyanates 15-16;
The most each constituent content is mass fraction.
2. prepare the preparation method of aqueous antistatic anticorrosive heat insulating coating as claimed in claim 1, its processing step
As follows:
A. prepare 3% Graphene aqueous to starch:
Based on mass fraction %, by dispersant 0.3-0.5, wetting agent 0.2-0.4, defoamer 0.2-0.4, many merits
Can add in deionized water 96 by amine auxiliary agent 0.1-0.2, dispersed with stirring be uniform, is slowly added to Graphene powder 3, dispersion
Supersonic oscillations 0.5h after uniformly, grind through nano-level grinder and are prepared as 3% Graphene slurry;
The preparation of b.A component:
Based on mass fraction %, deionized water 5-15 is added in dispersion tank, add under moderate-speed mixer dispersant 0.5-1,
Wetting agent 0.2-0.3, defoamer 0.3-0.5, levelling agent 0.3-0.5, antifungus agent 0.2, pH value regulator
0.15, Rutile type titanium dioxide 5-10, zinc aluminum phosphate 10-15, conduction potassium titanate fibre 5-10, high speed dispersion
30min, ground fineness reaches the graining paste of 30um;Above-mentioned graining paste is added in paint mixing tank, moderate-speed mixer
Lower addition Graphene slurry 7-20, hydroxyl acrylic aqueous dispersion 20-40, modified poly ester dispersion 10-20, add
Coalescents 1-2, defoamer 0.1-0.2, thickening agent 0.5-1, stir 20min, filter, pack.
The preparation of c.B component;By the sulfamate modification independent packed for standby use of HDI isocyanates;
During construction, with mass fraction by component A: B component=100:15-16 mixture.
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